Seed Stocking and Cultivating Management of Polyphylla and Fish Polyculture
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In polyculture, the stocking density of crab seedlings is basically the same as that of a single-saw-sawn crab pool, that is, 1,500 to 2,000 serrata crabs with a body weight of about 30 grams per acre are stocked. In the case of guaranteeing the yield of serrata, 100 to 200 larvae per mu, or 200 pufferfishes per mu. Tilapia can reproduce naturally in ponds, and it is necessary to control the number of seedlings to be released. The stocking density should be 100 tails per acre. If the tilapia male tilapia can be released, it will not reproduce in the pond and the stocking density can be appropriately increased. In the polyculture of serrata and squid, tilapia, and ridge tailed white shrimp, 60 to 80 squid, 30 to 40 tilapia, and about 2000 white stalks of puffer fish can be stocked per mu.
2. Cultivating management In the case where the blue crabs have sufficient feed, there is no need to feed additional feed for mixed fish. Such as Saw margin crab diet is not enough, you can increase the discretion of the bean cake, rice bran, bran, fish with food and so on, the amount of feeding to the fish can eat within 1 hour for the degree. Daily, on the afternoon, feeding twice, about 1 hour after feeding the fish bait, and then put the Serrata blue crab bait to reduce competition for food and improve the utilization of bait.
The daily management work mainly includes changing water, patrol pool, controlling water color, preventing disease, preventing escape, preventing floating head, preventing disease, and preventing theft.